Updated mediawiki/extensions
Project: mediawiki/extensions/VisualEditor  66615efc1fa4e5f3bac6e0bdd814aeacd73018e0

ve.ce.Surface.getSelectionRect() can return null

Document this fact and update callers to check for a null return value

Change-Id: I095041157cc0e24e48662f40690b4928bb8d829a